[TASK] Optimize Travis build matrix

* make the xlfcheck script executable
* add conditions around every test suit
* add a specific build matrix to exclude not needed multiple xlf checks

Releases: master
Change-Id: I245513542f205df8474dfc25ab7c1253143bbf91
Reviewed-on: http://review.typo3.org/35003
Reviewed-by: Wouter Wolters <typo3@wouterwolters.nl>
Tested-by: Wouter Wolters <typo3@wouterwolters.nl>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>